From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1AD51C433FE for ; Fri, 21 Oct 2022 02:25:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229542AbiJUCZ2 (ORCPT ); Thu, 20 Oct 2022 22:25:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37838 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229799AbiJUCY7 (ORCPT ); Thu, 20 Oct 2022 22:24:59 -0400 Received: from mail-io1-f69.google.com (mail-io1-f69.google.com [209.85.166.69]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2A7DC57DFB for ; Thu, 20 Oct 2022 19:24:41 -0700 (PDT) Received: by mail-io1-f69.google.com with SMTP id w16-20020a6b4a10000000b006a5454c789eso1267134iob.20 for ; Thu, 20 Oct 2022 19:24:41 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=8z0FghAsBHnMdB7WGXgG8YDep4XEt+nnJJSIwCr3tZc=; b=VStT6PkBrn5gED8WWPPb6i9tFDAS9zjeukstM00+iP0DYuAo7wa5log9WOIat6DKX6 GzGOE+XP7MOebvOJv8Y1HRz3X5+NEmKCX0NXfFB7n+5CQ4ltmQIhTen748e13NMZce1j 8UKhposcq2X6wdfaxMwx9/K8eK9O9FjctRN9h1ZHjgWDWR1IsiLpAf4lqHvC/L+J9Bo/ 5+mQbK3tt26TvkvmtFJB+X3q7H+dXQsWU6UINdveYft6yHULwln3bIlNEkmyGWkWO5M1 yhpFO3HiwOFtFmhuAiHCgNwFPg5fTnt0fPDeIVYtm4YuD0bk7oZXI+GooI3xuEAsolVP /mkg== X-Gm-Message-State: ACrzQf1R5Slj7GHbUYAK8kHW4diRcUFNtigV6HLDSWK/0FA+wM+aP08i 7udw1k5C2hTPexXHt9CESpgJEpbXLdTMdUh0nO3APyvv/HsZ X-Google-Smtp-Source: AMsMyM65vtQwH2Ou10Smz/pqf6uyZTbbPhmQ4dwaoCP8DIXCxCygzHEHUCMEMYLnuZhuHbDhWOeZwREij2y54FFLprxcMkWkFVKX MIME-Version: 1.0 X-Received: by 2002:a05:6638:3285:b0:356:4df5:5d10 with SMTP id f5-20020a056638328500b003564df55d10mr13669104jav.19.1666319080824; Thu, 20 Oct 2022 19:24:40 -0700 (PDT) Date: Thu, 20 Oct 2022 19:24:40 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000e528a905eb822440@google.com> Subject: [syzbot] BUG: unable to handle kernel paging request in percpu_counter_add_batch From: syzbot To: akpm@linux-foundation.org, jiebin.sun@intel.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, tim.c.chen@linux.intel.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: aae703b02f92 Merge tag 'for-6.1-rc1-tag' of git://git.kern.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1686e478880000 kernel config: https://syzkaller.appspot.com/x/.config?x=883de36878e6d869 dashboard link: https://syzkaller.appspot.com/bug?extid=96e659d35b9d6b541152 compiler: aarch64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 userspace arch: arm Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+96e659d35b9d6b541152@syzkaller.appspotmail.com Unable to handle kernel paging request at virtual address ffff70000b978a00 KASAN: maybe wild-memory-access in range [0xffff80005cbc5000-0xffff80005cbc5007] Mem abort info: ESR = 0x0000000096000006 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x06: level 2 translation fault Data abort info: ISV = 0, ISS = 0x00000006 CM = 0, WnR = 0 swapper pgtable: 4k pages, 48-bit VAs, pgdp=0000000045dfb000 [ffff70000b978a00] pgd=00000000bfbeb003, p4d=00000000bfbeb003, pud=00000000bfbea003, pmd=0000000000000000 Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 2820 Comm: kworker/0:3 Tainted: G W 6.1.0-rc1-syzkaller-00025-gaae703b02f92 #0 Hardware name: linux,dummy-virt (DT) Workqueue: events free_ipc pstate: 10000005 (nzcV daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : percpu_counter_add_batch+0x78/0x2f0 lib/percpu_counter.c:87 lr : percpu_counter_add_batch+0x44/0x2f0 lib/percpu_counter.c:87 sp : ffff8000120979c0 x29: ffff8000120979c0 x28: ffff0000151ff800 x27: 1fffe00002a3ff24 x26: ffff80005cbc5000 x25: ffff00000eeac7b0 x24: 1fffe00001dd58f6 x23: 000000007fffffff x22: ffff80000cc4e800 x21: 0000000000000000 x20: 0000000000000000 x19: ffff00000eeac758 x18: ffff00006a9cbbc0 x17: 0000000000000000 x16: 0000000000000000 x15: ffff800008d9c830 x14: ffff800008d78ecc x13: ffff800008d752d4 x12: ffff600002a3ff01 x11: 1fffe00002a3ff00 x10: ffff600002a3ff00 x9 : dfff800000000000 x8 : ffff0000151ff800 x7 : 00000000f1f1f1f1 x6 : dfff800000000000 x5 : ffff700002412f32 x4 : 1ffff000020ef1ac x3 : 1ffff0000b978a00 x2 : dfff800000000000 x1 : 0000000000000003 x0 : ffff80005cbc5000 Call trace: percpu_counter_add_batch+0x78/0x2f0 lib/percpu_counter.c:87 percpu_counter_add_local include/linux/percpu_counter.h:75 [inline] percpu_counter_sub_local include/linux/percpu_counter.h:225 [inline] freeque+0x20c/0x364 ipc/msg.c:292 free_ipcs+0xa0/0x160 ipc/namespace.c:125 msg_exit_ns+0x38/0x60 ipc/msg.c:1334 free_ipc_ns ipc/namespace.c:138 [inline] free_ipc+0xd0/0x1c0 ipc/namespace.c:157 process_one_work+0x780/0x184c kernel/workqueue.c:2289 worker_thread+0x3cc/0xc40 kernel/workqueue.c:2436 kthread+0x23c/0x2a0 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860 Code: f2fbffe2 92400801 d343fc03 11000c21 (38e26862) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: f2fbffe2 movk x2, #0xdfff, lsl #48 4: 92400801 and x1, x0, #0x7 8: d343fc03 lsr x3, x0, #3 c: 11000c21 add w1, w1, #0x3 * 10: 38e26862 ldrsb w2, [x3, x2] <-- trapping instruction --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.